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    <meta name="description" content="Draw a corridor." />
    <meta name="cesium-sandcastle-labels" content="Development" />
    <title>Cesium Demo</title>
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    <script id="cesium_sandcastle_script">
      window.startup = async function (Cesium) {
        "use strict";
        //Sandcastle_Begin
        // Create the viewer
        const viewer = new Cesium.Viewer("cesiumContainer");
        const scene = viewer.scene;

        // Example 1: Draw a red corridor on the globe surface.

        // Create the corridor geometry.
        let corridorGeometry = new Cesium.CorridorGeometry({
          positions: Cesium.Cartesian3.fromDegreesArray([
            -100.0,
            40.0,
            -105.0,
            40.0,
            -105.0,
            35.0,
          ]),
          width: 200000.0,
          vertexFormat: Cesium.PerInstanceColorAppearance.VERTEX_FORMAT,
        });
        // Create a geometry instance using the corridor geometry
        // created above. We can also specify a color attribute,
        // in this case, we're creating a translucent red color.
        const redCorridorInstance = new Cesium.GeometryInstance({
          geometry: corridorGeometry,
          attributes: {
            color: Cesium.ColorGeometryInstanceAttribute.fromColor(
              new Cesium.Color(1.0, 0.0, 0.0, 0.5)
            ),
          },
        });
        // Add the geometry instance to primitives.
        scene.primitives.add(
          new Cesium.Primitive({
            geometryInstances: redCorridorInstance,
            appearance: new Cesium.PerInstanceColorAppearance({
              closed: true,
            }),
          })
        );

        // Example 2: Draw a green corridor at a height.

        // Create the corridor geometry.  Use the height option
        // to set the corridor distance from the ground.
        // In this case, we are also using the corner type
        // option to draw mitered corners.
        corridorGeometry = new Cesium.CorridorGeometry({
          positions: Cesium.Cartesian3.fromDegreesArray([
            -90.0,
            40.0,
            -95.0,
            40.0,
            -95.0,
            35.0,
          ]),
          height: 100000.0,
          width: 200000.0,
          vertexFormat: Cesium.PerInstanceColorAppearance.VERTEX_FORMAT,
          cornerType: Cesium.CornerType.MITERED,
        });
        // Create a geometry instance using the corridor geometry
        // created above. Set the color attribute to a
        // solid green.
        const greenCorridorInstance = new Cesium.GeometryInstance({
          geometry: corridorGeometry,
          attributes: {
            color: Cesium.ColorGeometryInstanceAttribute.fromColor(
              Cesium.Color.GREEN
            ),
          },
        });
        // Add the geometry instance to primitives.
        scene.primitives.add(
          new Cesium.Primitive({
            geometryInstances: greenCorridorInstance,
            appearance: new Cesium.PerInstanceColorAppearance({
              closed: true,
              translucent: false,
            }),
          })
        );

        // Example 3: Draw a blue extruded corridor.

        // Create the corridor geometry.  To extrude, specify the
        // height of the geometry with the extrudedHeight option.
        // In this case, we are also using the corner type option
        // to draw beveled corners.
        corridorGeometry = new Cesium.CorridorGeometry({
          positions: Cesium.Cartesian3.fromDegreesArray([
            -80.0,
            40.0,
            -85.0,
            40.0,
            -85.0,
            35.0,
          ]),
          height: 200000.0,
          extrudedHeight: 100000.0,
          width: 200000.0,
          vertexFormat: Cesium.PerInstanceColorAppearance.VERTEX_FORMAT,
          cornerType: Cesium.CornerType.BEVELED,
        });
        // Create a geometry instance using the corridor geometry
        // created above.
        const blueCorridorInstance = new Cesium.GeometryInstance({
          geometry: corridorGeometry,
          attributes: {
            color: Cesium.ColorGeometryInstanceAttribute.fromColor(
              new Cesium.Color(0.0, 0.0, 1.0, 0.5)
            ),
          },
        });
        // Add the geometry instance to primitives.
        scene.primitives.add(
          new Cesium.Primitive({
            geometryInstances: blueCorridorInstance,
            appearance: new Cesium.PerInstanceColorAppearance({
              closed: true,
            }),
          })
        ); //Sandcastle_End
      };
      if (typeof Cesium !== "undefined") {
        window.startupCalled = true;
        window.startup(Cesium).catch((error) => {
          "use strict";
          console.error(error);
        });
        Sandcastle.finishedLoading();
      }
    </script>
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